Research Of Video Watermarking Technology Based On H.264 Compression Standard

Today is the age of informatization.In particular,the rapid development of information technology represented by computer technology and Internet technology,has made a profound impact on people's production,life,and thinking.However,at the same time,there are also some negative impacts accompanying with it,such as the frequent occurrence of various illegal infringement of digital multimedia products.And the problems of illegal copying of products and malicious tampering have become increasingly prominent.In order to solve these problems,people have designed pertinent protective technologies according to the characteristics of digital mulimedia products,and digital watermarking technology as a reliable means of protection arises at the historic moment.Video is the most prominent feature of multimedia information products,so we focus on video watermarking.What the main content of this subject is that,under the standard principle of H.264 video compression coding,based on the discrete cosine transform and singular value decomposition algorithm,and using MATLAB2015b,visual C++6.0 software simulation platform,the video watermarking information preprocessing method,video watermark embedding process and extraction process algorithm could be done further exploration and research.The main contents of this project are as follows:(1)The pretreatment methods for generating watermarking based on spread spectrum algorithm have been researched and improved.For the problem of the lack of traditional scrambling transformation in security,using Arnold transform and Logistic chaotic scrambling transform,and based on the characteristics of the spread spectrum used in digital signal processing,the spread spectrum technique for image is introduced,On the basis of the cryptographic threshold secret sharing algorithm.Synthesize the above process,and then apply them to the video watermark generation scheme to achieve the purpose of enhancing the security and reliability of the generated watermarking system.(2)A video watermarking algorithm based on singular value decomposition(SVD)optimized transform is designed.In this watermarking scheme,based on the H.264 video compression standard platform,first of all,the original image is divided into block DCT and transformed by DCT,then selected in the component coefficients of carrier video image frame energy information,through the optimization decomposition transformation of the singular value SVD,and then embedding and extracting video watermarking.The algorithm has a faster embedding speed and less distortion,at the same time it can make(3)the video watermarking system have better robustness,reduce the block effect brought by DCT transformation and so on.When the watermark is extracted during the decoding of the video information,the particpation of the original video is no longer needed,which meets the requirement of blind extraction of the watermark.A large number of experimental simulation results show that,the algorithm guarantees the high quality of video,the imperceptible of the watermark information and the robustness of the video watermarking system.